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What is Gene Expression ?
Gene expression is the process by which a gene is activated to produce a certain protein. Cells are able to respond to changes in the environment in two ways: 1.) by controlling the production of enzyme molecules that cause expression of a gene; and 2.) by controlling the activities of enzymes that are already present through the use of feedback mechanisms.
The control mechanism for gene expression is very different in prokaryotic cells than in eukaryotes. The way in which a specific gene expresses itself is of particular interest to scientists. Many diseases have been found to be genetically-based. Therefore, the ability to control the form and behavior of a cell or an organism would prove especially useful in the prevention and cure of disease.
One area that holds real promise in the near future is in the cloning of new tissues or organs to replace those that have become injured or diseased. Cells from the body can be used to produce clones because each cell contains a full complement of DNA. Cloning involves removal of a cell from an organism, and then providing that cell with all of the nutrients, gases, and physical conditions necessary for its growth, development, and reproduction.
The larger question is: since each and every cell has the same DNA information, what are the determining factors that cause a newly formed skin cell to form the specialized structures that enable it to perform the functions of skin, rather than, say, the types of protein structures that characterize muscle cells?
Give one example in each case of (a) a fixed joint, (b) a ball and socket joint, (c) a hinge joint. (a) The bones of the skull, the junction of pelvic gi
Name two ways in which the chances of hypothermia can be reduced during outdoor activities. Eating well before going out and wearing warm, wind-proof clothing can reduces the c
Q. How do bones grow? Bones form and develop through a process known as ossification. There are two types of ossification: endochondral ossification and intramembranous ossific
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write the names of these animals? 1.amoeba 2.sponge 3.hydra 4.liverfluck 5.Iscariot 6.leech 7.insects 8.oyster 9.starfish 10.frog
Do we know what causes mental illnesses, or how best to treat them? Mental illnesses take various forms: debilitating sadness in depression; uncontrollable repetitive actions i
habitat of protozoa .
Results of Monohybrid Crosses Mendel got the following results from his monohybrid crosses :- 1. F 1 plants produced by a cross between two plants pure for the cont
What is enzyme kinetics The study of the rate at which an enzyme works is called enzyme kinetics.
Explain the Completed Test - Most Probable Number Test? Coliform colonies on EMB or Endo agar are further examined by completed test by inoculating lactose broth and nutrient a
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